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  <script>
    // 17. 数组排序
    // [3,4,1,2,6,5] ---> [1,2,3,4,5,6]

    var arr = [3,4,1,2,6,5]
    arr.sort((a, b) => a - b)
    console.log('期望输出[1,2,3,4,5,6]')
    console.log(arr) // [1,2,3,4,5,6]
  </script>
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